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The continuing saga of my Commando Land Speed Racer.

Discussion in 'Norton Commando Motorcycles (Classic)' started by Eldo, Mar 6, 2017.

  1. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    Hi again all, just wanted to share some specifics of my new LSR motor by Herb Becker.

    last year, we set a record in the 1000cc pushrod class (M-PG1000/4) at the ECTA Ohio Mile, running a 860cc Commando motor with a relatively stock bottom end with a big valve, ported head. This winter Herb Becker has built a new 920cc motor to take better advantage of the 1000cc displacement limit. Here are some pics:

    850 head, with valve guides welded up, to be re-angled to elimitate valve overlap when bigger vlavles are installed.
    [​IMG]
    [​IMG]


    New Ferrea valves. 44mm intake, 38mm exhaust, 7mm stems.

    [​IMG]


    New valve guides for getting ready to be pressed into the head. You can see the extensive porting to be done.
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    [​IMG]

    Valve guides re-drilled, and porting finished; note the change from 4 bolt intake to 3, to accommodate the porting. We got 220cfm @ 8" of water with .480" lift. That should be good for 90-92hp at the wheel.

    [​IMG]
    [​IMG]
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    Lightened rockers, drilled tappets.
    [​IMG][​IMG]
     
  2. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    Balancing the crank.
    [​IMG]
    [​IMG]


    Boring the cylinders;
    [​IMG]
    [​IMG]

    New LA Sleeves to be installed:
    [​IMG]
    [​IMG]
    [​IMG]

    BSA lifters:
    [​IMG]
    [​IMG]

    Mikuni VM44 carbs, modified to fit with adjustments facing left and right, for ease of ajustment at the track:[​IMG]

    Megacycle .480" lift cam:
    [​IMG]

    Custom 3 bolt intake:
    [​IMG]

    JS Motorsport 81mm pistons:
    [​IMG]

    JS Motorsport rods installed on the crank:
    [​IMG]
     
  3. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    Everything else about ready to assemble and take to the dyno:
    [​IMG]
    [​IMG]
    [​IMG][​IMG]
    [​IMG]
     
  4. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    And here's a great little note from Herb, outlining everything he did:
    [​IMG]
     
  5. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    Eldo,
    That is some really serious head work done there. How many hours went into that alone?
    Love to see a dyno run with this all together. Will you bring it up to Don M's to get your engine dialed in?
    Cheers,
    Thomas
     
  6. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    Yes, Thomas; we'll have this to Don as soon as it's together. Looking forward to see what kind of power it will make!
     
  7. acadian

    acadian VIP MEMBER

    Joined:
    Mar 5, 2010
    Hey Eldo, had the pleasure of speaking with you and seeing bike up close at the Toronto bike show, can't wait to see the dyno numbers. :mrgreen:
     
  8. nortriubuell

    nortriubuell

    Joined:
    Aug 29, 2010
    Very, VERY cool 8) ... and GREAT pics, thanks for posting :)
     
  9. The Buckeye Rider

    The Buckeye Rider

    Joined:
    Jan 1, 2005
    Give us a heads up when you go to the ECTA in Ohio again and we'll stop in and cheer you on!
    Ride On
    Dave
     
  10. Changaroo

    Changaroo

    Joined:
    Jul 28, 2015
    That is some serious work there, I look forward to your report on the dyno .
    I hope I am mistaken, but looking at the photos of the intake side of the head, there appears to be a hairline crack. It starts on the rear rocker cover mating face, just to left of centre and goes down perhaps a inch or so. Hope I am wrong but it wouldn't hurt to check it out.
     
  11. lcrken

    lcrken VIP MEMBER

    Joined:
    Mar 15, 2009
    Really interesting details. Thanks for posting. Those are the largest valves I've ever seen fitted to a Commando head! Must have some serious valve guide re-angling.

    Ken
     
  12. cjandme

    cjandme

    Joined:
    Feb 5, 2011
    +1 I was a bit hesitant to say anything, least it sound nit picking or negative. Thank you for posting this thread, that sure looks like it is going to be a fantastic engine and should be good for a really competitive run.
     
  13. billet

    billet

    Joined:
    Nov 12, 2013
    Eldo, why the step in the outbored cylinder? I suppose it is not the final finish on that photo Before assemble of the liner?
    By the way, what cool hot rod you have in your garage! I really like the look of it!

    Sten
     
  14. Nater_Potater

    Nater_Potater VIP MEMBER

    Joined:
    Apr 7, 2013
    How I cringe seeing those massive holes open up in the bores! I know the sleeves carry the load just fine, but I can't help but imagine the fins falling off in chunks somewhere out on the Salt. It'll be just fine, as plenty of others have done the same thing. I'll just have to get over it...
    Thanks for sharing the pictures! It really helps drive home just how much goes into one of these in the search for the almighty horsepower. If you're adding approximately 45 HP to a stock motor, I shudder to think what each of those HP costs, both in dollars and time. Rock on!!!

    Nathan
     
  15. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    Billet, that's Herb's Oldsmobile powered Ford hotrod in background. In the other shot, you can see Herb's blown, twin engined Norton drag bike. Lots of go fast comapany, for sure!
     
    Dances with Shrapnel likes this.
  16. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    Nater_Potater, we have to go fast, not far...
     
  17. Mark

    Mark

    Joined:
    Aug 8, 2006
    Yep......... them are some big valves you've got there!
    How about a pic of the whole bike?
    What else have you done to it? lightening? gearing changes? etc.?
     
  18. jseng1

    jseng1

    Joined:
    Nov 26, 2009
    Great to see this level of craftsmanship and equipment.
     
  19. Eldo

    Eldo

    Joined:
    Mar 19, 2015
    Hi, Just wanted to add an update; Made it to the Dyno on Friday, and here's a quick vid of one of the runs and our Dyno Sheet. Made 90 rwhp on the very first pull! Backed it up with the another pull right at 90 as well.

    [​IMG]

    [​IMG]
     
  20. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    That's impressive. Lets hope it holds together. :mrgreen:
    Cheers,
    Thomas
     

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